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Why is there flow in the pipe, and the ultrasonic flow meter host also displays the "*R" status, and the instantaneous flow rate displayed by the machine is zero?

Q: Why is there flow in the pipe, and the ultrasonic flow meter host also displays the "*R" status, and the instantaneous flow rate displayed by the machine is zero?
Answer: Check if “Static Zero Setting” is used in the case of fluid (refer to M42). If yes, use the M43 menu to restore the original factory setting zero.

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